Improvement in pneumatic pressure-pumps



- J". s. HULL. V PNEUMATIC PRESSURE Puma Patented-April, 1876.

N PETERS, PHOTO-LITHOGRAPHER. WASHINGTON u c.

UNITED STATES PATENT OFFICE.

JOHN S. HULL, OF CINCINNATI, OHIO.

IMPROVEMENT .IN PNEUMATIC PRESSURE-PUMPS.

Specification forming part of Letters Patent No. 175,609, dated April 4,1876 application filed November 12, 1875.

To all whom it may concern:

Be it known that I, JOHN S. HULL, of Gincinnati, in the county ofHamilton and State of Ohio, have invented a new and Improved PneumaticPressure-Pump for Drawing and Forcing Liquids; and I do hereby declarethat the following is a full and exact description thereof, referencebeing bad to the accompanying drawings, making part of thisspecification- Figure 1 being a view in elevation of theentire apparatusembodying the invention; Fig. 2, a central vertical section of the partsot the apparatus to which my invention specially belongs.

Like letters designate correspondingparts in both figures. V

The main principle of this invention consists in the employment of theforce of compressed air introduced into any close vesselwith the vesselby a pipe or passage, 0.

A cut-oft valve, a is located at the bottom of the pump, or between itand the vessel, to retain the air and relieve the pump, which may betransferred to the use of some other vessel. The liquid is drawn fromthe vessel through a pipe or tube, D, with a spigot, b, at

the upper end.

For conveniently connecting the pipes O andD with the vessel I employ animproved stopper or bung, E, which is made to fit an ordinary bung-holeor similar aperture in the barrel or other vessel. This bung or stopperhasa central aperture, 0, through it, in which fits the liquid-drawingpipe D, and around this is an annular aperture, d,'extending only a partof its length at the inner end, and terminating outward in a sideoutlet, 6, with which the air-pipe G is coupled. Thus with one bung, andwithout any change ot'arrangement, both the air-pump and the drawingpipeare connected with the vessel.

The liquid-drawing pipe D is adjustable up and down in the central holeof the bung, according to the height of the'liquid in the vesselbeneath. Thus, if the liquid is at the height indicated in Fig. 2, thepipe D need not reach downward lower than represented 'D in the bung,while allowing an ad usting movement of the pipe, I employ a piece ofcork,f, situated in a cavity in the upper part of the bung, andcompressed tightly around the pipe by a'screw-plug, g, screwing downupon the cork.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. A portable vessel for containing a liquid to be drawn, its upperportion forming a pneumatic pressure-chamber for forcing out andelevating the liquid, and provided with a valved inlet, through whichair is introduced to produce the pressure, andwith a valve-outlet tubeor pipe, through which the liquid is expelled, substantially as and forthe purpose herein specified.

2. A bung or stopper, E, constructed with an air-inlet, d, andliquid-outlet c, substantially as and for the purpose herein specified.

3. The cork packing f and compressingplug g, arranged in the bung E, incombination with the drawing pipe D, substantially as and for thepurpose herein specified.

Specification signed by me this 7th day of July, 1875.

' JOHN S. HULL.

Witnesses:

J. S. BROWN,

E. M. GALLAHER.

